用QT写的PIV（粒子图像测速战速决）程序。在Ubuntu 9.10下测试通过。-Written with QT PIV (particle image measuring quick) program. In the next test pass Ubuntu 9.10.

SIFT（Scale-invariant feature transform）是一种检测局部特征的算法，该算法通过求一幅图中的特征点（interest points,or corner points）及其有关scale 和 orientation 的描述子得到特征并进行图像特征点匹配，获得了良好效果.-SIFT (Scale-invariant feature transform) is a local feature detection algorithm by finding a pictu